The accident record from a steel fabrication company in [2014][2015][2016][2017] shows that the most frequent accidents take place in overhead crane operation with a percentage of 42%. The overhead crane operation has the greatest potential of accidents with human error as the main cause. The purpose of this study is to determine what factors affect the occurrence of errors, to know how much HEPs, and to determine recommendations. The method used in this research is Success Likelihood Index Method (SLIM) with qualitative development using Decision Making Trial and Evaluation Laboratory (DEMATEL) which aims to establish the relationship among PSFs to be an easily comprehensible structured model by considering expert judgements and to solve dependency in a set of criteria. Analytic Network Process (ANP) is used to overcome the inconsistency of expert judgements and difficulty in selection and weighting. The calculation and analysis reveal that the highest Human Error Probability (HEP) value is shown by the task to handling or lifting with the value 0.000485. Impact assessment using the HEP value to determine probability and consequence is performed by expert judgements. Improvement recommendations are prioritized for high rating error tasks using Error Reduction Analysis.

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This paper is aimed to review the structure of single girder overhead crane using finite element analysis (FEA) technique. The strength and stiffness of existing single girder overhead crane with the capacity of 10 tons SWL and a span of 14 meters are calculated. The existing structure using SS400 steel plates is evaluated and compared with a new design using ST52-3. The stress and deformation of the existing structure are analyzed using Ansys software and a new design is proposed. Further, the effect of girder weight reduction to the decreasing of power required by the long-traveling motor is identified. The analysis shows the reduction of structure mass on the new design is 0.8 tons and the decrease in required traveling power is 1 kW. The maximum stresses of the existing and the new structure are 25 percent and 23 percent of the yield strength of the SS400 and ST52-3. The percentages of the maximum deformation to the allowable deflection limit are 43 percent and 58 percent, respectively.

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This study has investigated the effect of the circular cylinder placed at the side of advancing and plate deflector placed in front of returning blade. The CFD approach is done to solve the incompressible URANS. The numerical validation is done by comparing the experimental results using torque coefficient data for Cm=0.185 and TSR=1.078. The turbine using conventional Savonius 1 m of diameter and 1 m of height. A circular cylinder have diameter of 0.7D placed at x/D = 0.5D and y/D = 0.7D. The plate deflector is placed at 1D in front and center of turbine by varying the deflector plate on perpendicular free stream in placed in front of returning at distance variations (y/D) of 0, 0.1, 0.2, 0.3 and 0.4 with deflector angle of 30 degree towards the free stream direction and the Reynolds number of 4.32 x105. The study indicates that the deflector and circular cylinder can increase the turbine Performance at y/D of 0.3 in about 9.71 %.